Deep-Sub-Wavelength Magnetoquasistatic Indoor Navigation Sensor–2D Measurements

Recent progress in magneto quasi static (MQS) field-based techniques have enabled effective sensor techniques for accurate position sensing in indoor environments. Key to the technique is the ability to measure and invert MQS field couplings from an external active device to an internal active device. Due to use of low-frequency MQS couplings, the technique enables accurate field inversions within a few skin-depths into an indoor environment. We demonstrate 2D position tracking for a mobile MQS receiver device in a large indoor house environment with through-the-wall coupling, and analyze the error in data collected.